This page provides information about the Matte Shadows render element in V-Ray for Rhino.
Shows areas where light doesn't reach. Compare with the Raw Shadow Render Element, which gives areas of cast shadows.
||V-Ray Asset Editor|| > Render Elements (right-click) > Matte Shadows||V-Ray Asset Editor|| > Create Asset (left-click) > Render Elements > Matte Shadows
Denoise – Specifies whether to denoise this render element.